Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1287888 | Journal of Power Sources | 2006 | 4 Pages |
Abstract
Conducting polypyrrole electrodes obtained by electro-polymerization of pyrrole on vacuum metallized glass substrates are modified by doping with a range of metal halides as dopant ions having different electronegativity. Electro-oxidation of methanol using these electrodes is studied by means of cyclic voltammetry in 0.1Â M HClO4 as supporting electrolyte. It is found that the electronegativity of the dopant ion plays a very important role in the electrocatalytic activity. Polypyrrole doped with zirconium chloride gives the highest anodic current of 10Â mAÂ cmâ2 at the oxidation potential of methanol. The results are explained on the basis of the charge-transfer efficiency at the electrode|electrolyte interface, which is associated with the acceptor state created by the dopant in the semi-conducting polymer.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
S. Radhakrishnan, Arindam Adhikari,